It's a bit different from what you've asked for, but I can highly recommend Chateau Monfreville.
It does have a natural swimming pond, and a hot tub, and it's situated perfectly for so many Normandy attractions, we also went to Mont St. Michel and Cherbourg from here. The entertainment is what you make it- basically we found that the kids on the campsite got together and organised games whilst we had a fire.
There is a shop which is a little bit limited, but supermarkets are within a 10 min drive.
In the summer, the owners organise special food nights- moules and frites, roast chicken and pizza. These are very reasonable, excellent quality and you can bring a bottle. They also deliver a huge range of bread/croissants in the morning. There is a fab ice cream place at the factory in Isigny sur mer.
There is no electric at pitch, although you can charge devices at a central point, ad they also have a communal fridge/freezer. You do also have to remember to take your own loo roll which is a pain, but common on many French site.
I want to go back now I've reminisced!